Nut-lock



G. H. COCKS,

NUT LOCK. APPLICATION FILED SEPT, I8, [920- 1,379,394. Patented May 24,1921.

UNITED STATES PATENT OFFICE.

GEORGE nomvrns cocks, or ADRIAN, MICHIGAN.

nor-Look.

To all whom it may concern:

Be it known that I, Gnonen l ionirns Cooks, a citizen of the UnitedStates, re.- siding at Adrian, in the county of Lenawee and State ofMichigan, have invented certain new and useful Improvements in Nut-Locks, of which the following is a specification, reference being hadtov the accompanying drawings.

This invention relates to nut locks, and

particularly to that class of nut locks wherein a key is disposed withina key seat formed in the bolt and engages the nut to prevent theaccidental removal of the nut unless the key be withdrawn. V

The general object of my invention is to provide a very simple andcheaply constructed nut lock which may be used with standard bolts andnuts and requires no special construction of the nut or of the boltother than the formation of the ordinary key seat in the bolt.

A further object is to provide a nut lock of this character in which thekey has a long bearing against the sides of the key seat and in whichthe key or look may be readily removed or replaced and used a largenumber of times without any injury to the nut lock or to the bolt andnut.

Other objects will appear in the course of the following description.

My invention is illustrated in the accompanying drawings, wherein Figure1 is an elevation of a shaft and nut with my nut lock applied thereto;

Fig. 2 is a sectional view through the shaft and nut showing my nut lockapplied thereto;

Fig. 3 is an end elevation of the shaft, nut and nut lock;

Fig. 4 is a side elevation of the nut lock.

In these drawings, 10 designates a bolt, shaft or like member which isscrewthreaded with standard threads 11 and which is formed with alongitudinally extending key seat 12, the nut 13 being of ordinary form.

The key or look is designated generally 15 and is made of spring steel.This member 15 is bent so as to form a portion 16 which extendsapproximately parallel to the axis of the bolt when the device is inuse, the clip 15 being then bent around and overhanging this portion 16,as at 17. The portion 16 is corrugated or bent so as to form a sectionof a screw-thread corresponding in Specification of Letters Patent.Patented :M 24 1921 Application filed September 18, 1920. Serial411,241.

that there is a standard of threads for each size nut. Thus a a! nut 16threads to the inch, a it nut 13 threads to the inch, a 5- not 11threads to the inch, a i nut 10 threads to the inch, and so on. Thesizes of the key seat in the shaft or like member are standard fordifferent sizes of shafts. Thus for a 1 shaft, the key seat is and,therefore, the key 15 for a 1 nut would have a width of and 8 threads tothe inch, which are standard for 1 nuts, and so on, the width of the keyand the number of threads to the inch varying with the sized nut to beused and the sized key which is used.

In the use of this device, the nut is placed ened up. The spring clip orkey is then slid into the key seat and the corrugated portion 15 willslide over the thread on the nut left bare by the key seat. l/Vhen thearm 17 of the key engages the side face of the nut 14;, the resilienceof the spring metal key will cause the notches or corrugation in theportion 16 to fit into and engage with the thread of the nut. Thus theclip or key is held from sliding off the shaft and nut by thecorrugation at one end of the key. Thus the key is held in suchengagement with the nut that if the nut 13 is to turn, the edge ofportion 16 upon the shaft or other member 10 and tightof the key willbear against the side wall of the key seat while the other edge willbite into the nut threads and the nut will be held from turning. hen itis desired to remove the nut or release it, it is only necessary to pullout forcibly on the clip or key, whereupon the arm 17 will slide off ofthe face 14 and the part 16 will free itself from the beveled threads inthe nut and the clip is removed. Then the nut may be unscrewed. It isobvious that this clip or key may be insorted and replaced any number oftimes without injury. It will also be seen that the nut does not ave tobe turned around to a certain definite place to lock the nut, but thatone-sixth of a turn, where the nut is hexagonal, will lock the nut.

It will be noted that the key has a relatively long bearing against thesides of the nut. the portion inserted within the key havingcorrugations approximately fitting thethreads of the nut, the resilienceof the key when in place screw-threaded member having a longitudinallyextendingkey seat, of a key for the nut comprising a strip of resilientmetal bent upon itself to provide a portion adapted to be inserted. insaid key seat, and a portion adapted to bear upon the outside face ofthe seat causing this corrugated portion to bear against the threads ofthe nut. r

2. The combination with a screw-threaded member having a longitudinallyextending key seat and a nut engaging the screw- 7 threaded member, of alocking device for the nut comprising a strip of resilient metal bentupon itself to provide a portion adapted to extend along the key seatand having a width approximately the same as the key seat and corrugatedto fit the threads of the nut, and a resilient portion adapted to extendover and engage theouter face of the nut, the two portions being urgedtoward each other to resiliently grip againstthe inner and outer. facesof the nut by the resilience of the material from which the lockingdevice is made. v a

3. A locking devicerfor nuts comprising a strip of resilient metal bentto provide a portion adapted to be inserted within a key seat formed ina screw-threaded member,

and a portion adapted to engage upon the exteriorface of a nut, saidfirst-named portion being formed with a plurality of corrugationsadapted to fit the threads of a nut and said portions being urged towardeach other by the resilience of the metal from which the locking deviceis made. 7 r V In testimony whereof I hereunto afiir; my

signature. 7 a l e GEORGE HOLMES COCKS.

